Wrench.



w SHEPH'ERDSON.

WRENCH.

APPUCATION FILED NOV. s, 19m.

Patented May 21, 1918.

ATTORNEY seam.

31:11 MF W WILLIAM SHEPHERDSON, 0F SANDPOINT, IDAHO.

WRENCH.

To all whom it may concern:

Be it known that I, WILLIAM SHEPHERD- SON, a citizen of the United Statespresiding at Sandpoint, in the county of Bonner and State of: Idaho, haveinvented certain new and useful Improvements in Wrenches, of which the following is'a specification.

i This inventionrelates to wrenches, and more particularly to that type :of wrench employing av fixedv jaw and a slidable jaw movable toward and away from the fixed jaw. i a

One of the main objects of the invention is to providea wrench of the character stated of simple construction and operation. A further. objectis to provide a wrench composed of a minimum of parts and which may be produced at comparatively small cost. A further object is to provide a wrench in which the movable jaw may be quickly and easily adjusted, the means for adjusting this jaw also serving to lock it in adjustment. Further objects will appear from the detailed description;

In the drawings:

Figure 1 is a side view ofa Wrench c011- structed in accordance with my invention as applied.

Fig. 2 is a perspective view of the movable handle.

Fig. 3 is a justing pawl.

Fig. 4 is a view similar to Fig. 1 of a wrench adapted for gripping pipes and similar cylindrical objects.

Fig. 5 is a section taken substantially on line 55 of F g. 1.

' The wrench is provided with a metal handle or shank 1 of rectangular cross section which is provided at one end with the integral gripping head 2. The intermediate portion of the inner or upper face of shank 1 is toothed to provide a rack 3, the teeth of this rack being directed toward jaw 2. A keeper or sleeve 4 is slidably mounted on handle 1, the eye of this sleeve being of slightly greater width than handle 1 so as to permit limited rocking movement of gripping jaw 5, which is formed integral with the sleeve, toward and away from the fixed jaw 2. Movable jaw 5 is provided in each lateral face and adjacent the upper outer corner thereof with a substantially U-shaped cut-out or recess 6. These recesses are adapted to receive the spaced ears 7 which are formed integral with the movable handle perspective detail of the ad- Patented May an iaie.

Application filed November 15, 1917. Serial No. 202,192.

8 at the inner end thereof, these cars receivmg snugly between them the bridge or web member 9 of jaw 5 formed by the recesses 6. Web member 9 and ears 7 are provided with alined bores which receive a pivot pin 10 for pivotally securing the inner end of handle or 1ever 8 to jaw 5. Handle 8 is pro vided, in rear of pivot pin 10, and in each lateral face, with an outwardly directed recess 11. These recesses are adapted to re ceive the spaced arms 12 of a pawl 13 the point 14 of which is curved downwardly for engagement with the rack 3. The arms 12 of the pawl and the web member 15 of handle 8 intermediate the recesses 11 are pro vided with alined bores which receive a pivot pin 16 for pivotally securingthe pawl to thearm. By raisingthe arm 8 and bringing the pawl 13 into'engagement with any one of the teeth of rack"3, selectively, as indicated by broken lines in Fig. 1, and then forcing handle Steward handle 1, the mov able jaw 5 may be forced toward the fixed jaw 2 so as to tightly grip an object placed between these two jaws. During this operation, the pawl 13 and the portionof' arm 8 between the pivot pins 10 and 16 constitute a toggle lever for forcing the movable jaw toward the fixed one.

As will be noted, the ears 7 of handle 8 are offset or directed upward at an angle to the handle so as to bring the pivot pin 10 well above pivot pin 16 when handle 8 is in operative position as in Fig. 1. When an object, such as the nut 17 is gripped between the jaws 2 and 5, the jaw 5 being forced tightly into engagement with this object, the line of pressure exerted on this jaw will be transmitted to the handle 8 through pivot pin 10 so as to pass above pivot pin 16 and the axis of this handle. As a result of this, the pressure from jaw 5 tends to rock the outer portion of handle 8 downward about the pivot pin 16. This results in bringing the shoulders 18 formed at the upper edges of the recesses 11 in handle 8 into engagement with the upper edges of the arms 12 of pawl 13 thus exerting downward pressure on the pawl so as to maintain it in engagement with rack 3. The pawl 13 and the portion of handle 8 intermediate the pivot pins 10 and 16 thus constitute, in addition to adjusting means, an eccentric lock for locking the jaw 5 in adjustment. For convenience in operating the adjusting means, handle 8 is provided adjacent inner end with a shoulder 19 which engages a cooperating shoulder 20 formed at the upper corner of movable head so as-to positively limit the upward movement of this handle. The op;

eration of the wrench shown in Fig. 4 of the drawings is the same as that above described; theionly'difierence being that the toothed in the manner of a pipe wrench so as g to, gripv cylindrical objects firmly when moved; into engagement therewith.

Aswill be noted .from-iEigs. l and 3 of 4 the-drawings, whenthe wrench isin gripwould-occurif theitoggle lever composed-of the, pawl and the inner end 1 portion'of the lever arm. 8. were, folded downwardly, is avoided In additiom-the locking-of: the jaw is. easilyeffected, and the. handle or. le-

tion.

ver-8 may-be raised'with but slight exer- What I claim is:

In a wrench, a handle provided at one end with afixed gripping jaw, a movable gripping jaw slidable on said handle, the handle being provided in its inner face with an intermediate rack portion, a movable handle pivotally secured at its inner end to said slidable; jaw, and -a pawl pivotally secured at its inner end to said movable handle intermediate the ends thereof and adapted to engage the teeth ofathe rack sons-to force the movable jaw toward the fixed jaw when theamovable handle-is depressed, said pawl andthe: movable handle being provided with cooperating, shoulders. acting. to positively limit movement of the movable.handlentowardthe handle-of the fixedijaw so as..to bring. the axes of the pawl and ethemovable handleinto -.alinement with: each other. and

VV'ILLIAM} SHEPHERDSQN.

Witnesses In WVILKINS, J. R. ADAM;

Copies. of tl is;pat.ent,.may:. be. obtainedffor'fivercents each, byvaddressing theflcommissioner, of-.-Patents, washipgtcmmacl 

